Senior Backend Engineer (Ruby), Plan: Spec-Driven Development at Gitlab

Senior Backend Engineer (Ruby), Plan: Spec-Driven Development

Gitlab · Remote, PolandRemotesenior

In short

▸Ingeniero backend senior en Ruby que construye flujos de inteligencia artificial para convertir intenciones en código ejecutable.
▸Trabajas en equipo distribuido en un proyecto de alto impacto, liderando features desde la idea hasta el lanzamiento con enfoque en evaluación y métricas.
▸Destacado: Usas IA generativa (LLM) y agentes para automatizar el desarrollo de software, con un enfoque en calidad y eficiencia.

Proficiency in English is required for collaboration in a fully remote, global team.

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What they ask for

✓Experiencia sólida en Ruby on Rails en un código base grande y en producción.
✓Experiencia en Python en entornos de producción.
✓Capacidad para liderar proyectos completos desde la definición hasta el despliegue.
✓Habilidades en diseño de APIs, modelos de datos y sistemas de evaluación.
✓Experiencia colaborando con productos, diseño y usuarios para definir scope.
✓Capacidad de mentoría y toma de decisiones técnicas en entornos remotos y asíncronos.

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Ruby on RailsPythonPostgreSQLGraphQLRESTGitLab Duo Agent PlatformLarge Language Model APIsAI GatewayGitLabLLM application programming in

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GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role As a Senior Backend Engineer on the Plan: Spec-Driven Development team, you'll help build GitLab's intent-to-code loop: agentic workflows that turn a stated intent into a refined work item, an implementation plan, and verified, mergeable code. You'll own early-stage backend work across the flows, application programming interfaces, data models, and evaluation systems behind this experience, using Ruby on Rails, Python, PostgreSQL, GitLab Duo Agent Platform, large language model application programming interfaces, and an artificial intelligence gateway. You'll join a small, distributed team working on one of GitLab's highest-visibility product bets, collaborating with design partners toward a public beta. In your first year, you'll lead major features from an unclear problem through release, help shape scope with product and users, mentor other engineers, and influence technical decisions across agent workflows and evaluation methods. What you’ll do • Lead backend features from early product discussions through technical design, implementation, rollout, and post-launch learning. • Build the flows, application programming interfaces, and data models behind agent-generated work items, implementation plans, durable specifications, and mergeable code. • Develop evaluation and benchmarking systems that measure workflow quality, token cost, and success rate. • Use Ruby on Rails and Python to build reliable production systems, with PostgreSQL, GraphQL, representational state transfer, GitLab Duo Agent Platform, large language model application programming interfaces, and an artificial intelligence gateway. • Collaborate directly with product, design, engineers, design partners, and users to shape scope and make practical trade-offs. • Coordinate multi-person projects across the team and communicate decisions clearly in GitLab's asynchronous, all-remote environment. • Mentor other engineers and contribute to technical direction across the Plan group and related artificial intelligence initiatives. • Work in short iterations, share progress through demos, and use results and user feedback to guide what comes next. What you’ll bring • Strong Ruby on Rails experience in a large production codebase and production experience with Python. • Experience driving substantial projects with several e

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